JPH10287465A - Basic brick and its production - Google Patents
Basic brick and its productionInfo
- Publication number
- JPH10287465A JPH10287465A JP9110120A JP11012097A JPH10287465A JP H10287465 A JPH10287465 A JP H10287465A JP 9110120 A JP9110120 A JP 9110120A JP 11012097 A JP11012097 A JP 11012097A JP H10287465 A JPH10287465 A JP H10287465A
- Authority
- JP
- Japan
- Prior art keywords
- mgo
- brick
- zro
- particles
- magnesia
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、塩基性煉瓦および
その製造方法に関し、特に、鋼精錬の二次精錬設備であ
るＲＨ（Ｒｕｈｒｓｔａｈｌ−Ｈｅｒａｕｓ）、ＤＨ
（Ｄｏｒｔｍｕｎｔ−Ｈｏｒｄｅ）、ＣＡＳ（Ｃｏｍｐ
ｏｓｉｔｉｏｎ Ａｊｕｓｔｍｅｎｔ ｂｙＳｅａｌｅ
ｄ Ａｒｇｏｎ Ｂｕｂｂｌｉｎｇ）等の溶融金属容器
の槽内のライニングに適用して、スラグ浸潤やそれに伴
う構造スポールによる剥離等の損耗を抑制し、設備の耐
用性向上を図るための塩基性煉瓦およびその製造方法に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a basic brick and a method for producing the same, and more particularly, to a secondary refining facility for steel refining, RH (Ruhrstahl-Heraus), DH.
(Dortmunt-Horde), CAS (Comp
position Adjustment bySeaale
d. Basic brick for applying to the lining in the tank of a molten metal container such as Argon Bubbling to suppress slag infiltration and accompanying delamination due to structural spall, and to improve the durability of equipment, and to manufacture the basic brick. About the method.
【０００２】[0002]
【従来の技術】溶融金属容器、特に、鋼精錬の二次精錬
設備であるＲＨ、ＤＨ等の脱ガス槽の内張ライニングに
は、マグネシア・クロム煉瓦等の塩基性煉瓦が適用され
てきた。脱ガス処理とは、溶鋼を真空中の槽内に吸い上
げ、同時に環流させることにより、溶鋼中のＨ、Ｎ、Ｏ
およびＣ等の成分を除去するものである。これらのライ
ニングは、処理中に保持された溶鋼により加熱され、処
理終了後には、常温の空気と接触し急冷されることにな
る。このような急熱、急冷により、ライニング煉瓦に熱
スポールによる亀裂や、構造スポールによるスラグ浸潤
層の剥離を生じ、耐火物損耗の原因の１つとなってき
た。ここで、熱スポールとは、急熱や急冷により耐火物
内部に熱応力が生じ、耐火物に亀裂や剥離が生じる現象
を言う。また、構造スポールとは、熱衝撃で、煉瓦稼働
面に平行に生じたスラグ浸潤層と原煉瓦層の間に亀裂が
発生し、剥離を生じる現象を言う。2. Description of the Related Art Basic bricks such as magnesia-chrome bricks have been applied to the lining of a molten metal container, particularly a degassing tank for a secondary refining facility for steel refining such as RH and DH. Degassing is a process in which molten steel is sucked into a vacuum chamber and refluxed at the same time, so that H, N, O
And C and other components. These linings are heated by the molten steel held during the process, and after the process is finished, they come into contact with room temperature air and are rapidly cooled. Such rapid heating and quenching have caused cracks in the lining brick due to thermal spalls and peeling of the slag infiltration layer due to structural spalls, which has been one of the causes of refractory wear. Here, thermal spall refers to a phenomenon in which thermal stress is generated inside a refractory due to rapid heat or rapid cooling, and cracks or peeling occurs in the refractory. The structural spall refers to a phenomenon in which a thermal shock causes a crack to be generated between the slag infiltration layer and the original brick layer, which are generated in parallel with the brick working surface, thereby causing peeling.
【０００３】構造スポール抑制には、煉瓦中へのスラグ
浸潤を減らすことが特に有効な手段であり、このような
損耗を抑制するために、従来は、以下の様な対策がとら
れて来た。[0003] In order to suppress structural spall, it is particularly effective to reduce slag infiltration into bricks. In order to suppress such wear, conventionally, the following measures have been taken. .
【０００４】例えば、特開昭６２−１１９１５９号公報
には、マグネシア・クロム煉瓦のＣｒ2 Ｏ3 成分を増加
させ、耐熱スポール性を維持しつつ、耐スラグ浸潤性を
向上させる方法が開示されている。また、特開昭５４−
１６３９１０号公報では、純度９５％以上のＺｒＯ2 を
含有する粒径０．２ｍｍ以下のジルコニアを１０重量部
以下含むマグネシア・クロム煉瓦は、緻密で熱間強度が
高く、耐スラグ浸潤性、耐構造スポール性に優れること
が開示されている。また、特開昭６０−１０８３６１号
公報では、スラグと反応し難く、高融点のＣａＯとの化
合物を作るＺｒＯ2 と、ＦｅＯ等の酸化鉄成分に対して
高耐用なピクロクロマイト（ＭｇＯ−Ｃｒ2 Ｏ3 ）から
なる微粉部を持つＭｇＯ−ＺｒＯ2 −Ｃｒ2 Ｏ3 系煉瓦
が、高耐スラグ浸潤性と高耐熱スポール性を有すること
が開示されている。For example, Japanese Patent Application Laid-Open No. 62-119159 discloses a method of increasing the Cr 2 O 3 component of magnesia chrome brick to improve the slag infiltration resistance while maintaining the heat resistance spall property. I have. Also, Japanese Patent Application Laid-Open No.
According to Japanese Patent No. 163910, a magnesia-chromium brick containing 95% or less of ZrO 2 and containing 10 parts by weight or less of zirconia having a particle size of 0.2 mm or less is dense, has high hot strength, is resistant to slag infiltration, and has a structure resistant to slag. It is disclosed that it has excellent spall properties. Further, in JP-A-60-108361, it is difficult to react with the slag, and ZrO 2 to make a compound of the high melting point of CaO, long service life of pixels runner chromite against the iron oxide component such as FeO (MgO-Cr 2 O 3) MgO-ZrO 2 -Cr 2 O 3 system brick with fines portion made of is disclosed to have a high resistance to slag infiltration resistance and high heat spall resistance.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、近年、
高純度鋼製造のために槽内へのＣａＦ2 等の添加が行わ
れ、その結果、操業中、高塩基度（以下、塩基度をＣ／
Ｓと表記する）スラグが生成する結果となった。However, in recent years,
For the production of high-purity steel, CaF 2 and the like are added into the tank. As a result, during operation, a high basicity (hereinafter referred to as C /
A slag was generated (denoted as S).
【０００６】また、上記従来技術のように、焼成後の煉
瓦中で２００〜５００μｍ以上の中・粗粒部の粒子を除
いたものをマトリックス部とすると、このマトリックス
部に、焼成マグネシアや電融マグネシア等のＭｇＯ成分
の他に、クロム鉄鉱等のＣｒ2 Ｏ3 成分と、ジルコニア
が含まれることになる。このような煉瓦では、高Ｃ／Ｓ
スラグに対しては、Ｃｒ2 Ｏ3 成分がスラグ中のＣａＯ
と低融点物を作ることになり、スラグ湿潤性が低くなる
という問題がある。Further, as in the prior art described above, when the bricks after firing are obtained by removing the particles of the medium and coarse particles of 200 to 500 μm or more into the matrix portion, if the fired magnesia or electrofused In addition to the MgO component such as magnesia, a Cr 2 O 3 component such as chromite and zirconia are included. In such bricks, high C / S
For slag, Cr 2 O 3 component contains CaO in slag.
Thus, there is a problem that slag wettability is lowered.
【０００７】すなわち、特開昭６２−１１９１５９号公
報に開示されたマグネシア・クロム煉瓦のＣｒ2 Ｏ3 成
分を増加させる方法では、高Ｃ／Ｓスラグ中のＣａＯが
Ｃｒ2 Ｏ3 成分と低融点物を作り、Ｃｒ2 Ｏ3 成分が多
く存在する煉瓦マトリックス部の耐食性を低下させる。
また、特開昭５４−１６３９１０号公報に開示されたＭ
ｇＯ−ＺｒＯ2 −Ｃｒ2 Ｏ3 系煉瓦でも、高Ｃ／Ｓスラ
グ中のＣａＯと煉瓦マトリックス中のＣｒ2 Ｏ3 成分が
低融点物を作り、ＺｒＯ2 により緻密化された煉瓦マト
リックスを脆弱化させ、結果的に耐スラグ浸潤性と耐食
性を低下させる。また、特開昭６０−１０８３６１号公
報に開示されたＭｇＯ−ＺｒＯ2 −Ｃｒ2 Ｏ3 系煉瓦も
例外ではなく、緻密なピクロクロマイトを含み、ＺｒＯ
2 が共存するマトリックス部へ高Ｃ／Ｓスラグが侵入し
た場合にも、やはりマトリックス部で低融点物が生成
し、マトリックス部を脆弱化させ、耐食性を低下させ
る。That is, according to the method disclosed in Japanese Patent Application Laid-Open No. Sho 62-119159 for increasing the Cr 2 O 3 component of magnesia chrome brick, CaO in the high C / S slag has a low melting point with the Cr 2 O 3 component. And reduce the corrosion resistance of the brick matrix portion containing a large amount of Cr 2 O 3 component.
In addition, M disclosed in Japanese Patent Application Laid-Open No. 54-163910
in gO-ZrO 2 -Cr 2 O 3 based brick, Cr 2 O 3 component of CaO and bricks in a matrix of high C / S in the slag is made a low-melting material, weakening the brick matrix is densified by ZrO 2 As a result, slag infiltration resistance and corrosion resistance are reduced. Further, JP 60-108361 Patent disclosed in Japanese the MgO-ZrO 2 -Cr 2 O 3 based brick is no exception, comprise a dense pixels runner chromite, ZrO
Even when the high C / S slag penetrates into the matrix portion where 2 coexists, a low melting point material is also generated in the matrix portion, weakening the matrix portion and reducing the corrosion resistance.
【０００８】そこで、本発明は、上記課題を有利に解決
して、溶融金属容器、特に二次精錬設備であるＲＨ、Ｄ
Ｈ、ＣＡＳ等での槽内にライニングされた煉瓦の損耗を
抑制し、設備の耐用性向上と共に生産性向上を図ること
のできる塩基性煉瓦およびその製造方法を提供すること
を目的とするものである。Accordingly, the present invention advantageously solves the above-mentioned problems and provides a molten metal container, particularly RH, D, which is a secondary refining facility.
It is an object of the present invention to provide a basic brick capable of suppressing the abrasion of a brick lined in a tank with H, CAS, etc., and improving the durability and the productivity of equipment and the production method thereof. is there.
【０００９】[0009]
【課題を解決するための手段】本発明者らは、上記課題
を解決する手段を鋭意研究した結果、耐スラグ浸潤性、
耐食性および耐構造スポール性を改善した煉瓦を提供す
るためには、マトリックス部の耐スラグ浸潤性を耐食性
を損なわず向上させる必要があり、そのためには、従来
のように示すマトリックス部にＣｒ2 Ｏ3 成分とＭｇＯ
とＺｒＯ2 を共存させず（図２）、図１に示すようにマ
トリックス部にはＭｇＯとＺｒＯ2 のみを共存させ、Ｚ
ｒＯ2 の本来の機能、すなわち、ＺｒＯ2 のＣａＯ吸収
機能を発揮させるべきであるとの知見を得た。Means for Solving the Problems The present inventors have intensively studied means for solving the above-mentioned problems and found that the slag infiltration resistance,
In order to provide an improved corrosion resistance and structural spalling resistance brick, it is necessary to improve without impairing the corrosion resistance slag infiltration of the matrix portion. For this purpose, Cr 2 O to the matrix portion shown as in the prior art 3 components and MgO
And ZrO 2 do not coexist (FIG. 2), and only MgO and ZrO 2 coexist in the matrix portion as shown in FIG.
It has been found that the original function of rO 2 , that is, the CaO absorption function of ZrO 2 should be exerted.
【００１０】本発明は、上記知見に基づいて発明された
ものであり、その要旨は、以下の通りである。 （１） 化学成分組成が、重量比で、ＭｇＯ≧２０％、
Ｃｒ2 Ｏ3 ≧１０％、ＺｒＯ2 ＝１〜２０％であり、ミ
クロ組織のマトリックス部がＭｇＯとＺｒＯ2 からな
り、残部が１００μｍ超のＣｒ2 Ｏ3 粒子の他、ＭｇＯ
粒子からなるミクロ組織を有することを特徴とする塩基
性煉瓦。[0010] The present invention has been made based on the above findings, and the gist thereof is as follows. (1) The chemical composition is MgO ≧ 20% by weight,
Cr 2 O 3 ≧ 10%, a ZrO 2 = 1~20%, becomes the matrix of the microstructure of MgO and ZrO 2, another remainder of 100μm greater than Cr 2 O 3 particles, MgO
A basic brick having a microstructure of particles.
【００１１】（２） ＭｇＯ源として焼結マグネシア、
電融マグネシア、電融マグクロ、焼結マグクロの１種以
上を、Ｃｒ2 Ｏ3 源として１００μｍ超のクロム鉄鉱、
酸化クロムの１種または２種を、さらに、１００μｍ以
下のジルコニアを煉瓦製造の出発原料とすることを特徴
とする、化学成分組成が、重量比で、ＭｇＯ≧２０％、
Ｃｒ2 Ｏ3 ≧１０％、ＺｒＯ2 ＝１〜２０％であり、ミ
クロ組織のマトリックス部がＭｇＯとＺｒＯ2 からな
り、残部が１００μｍ超のＣｒ2 Ｏ3 粒子の他、ＭｇＯ
粒子からなるミクロ組織を有する塩基性煉瓦の製造方
法。(2) Sintered magnesia as an MgO source,
Using at least one of electrofused magnesia, electrofused magcro, and sintered magcro as a Cr 2 O 3 source;
Characterized in that one or two kinds of chromium oxides and zirconia having a size of 100 μm or less are used as starting materials for brick production, wherein the chemical composition is MgO ≧ 20% by weight,
Cr 2 O 3 ≧ 10%, a ZrO 2 = 1~20%, becomes the matrix of the microstructure of MgO and ZrO 2, another remainder of 100μm greater than Cr 2 O 3 particles, MgO
A method for producing a basic brick having a microstructure composed of particles.
【００１２】[0012]
【発明の実施の形態】以下、本発明の実施の形態を図面
を参照しながら詳細に説明する。本発明では、図１に示
すようにマトリックス部にはＭｇＯとＺｒＯ2 のみを共
存させることにより、塩基性煉瓦の耐スラグ浸潤性、耐
食性および耐構造スポール性を改善する。焼成後の煉瓦
マトリックス部をＺｒＯ2 とＭｇＯのみにするために
は、煉瓦製造前の杯土中に添加するＣｒ2 Ｏ3 源を１０
０μｍ超のクロム鉄鉱、酸化クロムとする。これは、１
００μｍ以下のＣｒ2 Ｏ3 源を適用した場合、前述のよ
うに、高Ｃ／Ｓスラグが煉瓦中に侵入した場合、マトリ
ックス部に低融点物が生成し、耐スラグ浸潤性ならびに
耐食性が低下するためである。Embodiments of the present invention will be described below in detail with reference to the drawings. In the present invention, as shown in FIG. 1, by coexisting only MgO and ZrO 2 in the matrix portion, the slag infiltration resistance, corrosion resistance and structural spall resistance of the basic brick are improved. In order to make the brick matrix portion after firing only ZrO 2 and MgO, it is necessary to use a Cr 2 O 3 source added to the clay before the brick production.
It is chromite or chromium oxide having a thickness of more than 0 μm. This is 1
When a Cr 2 O 3 source of 00 μm or less is applied, as described above, when high C / S slag invades the brick, a low-melting substance is generated in the matrix portion, and slag infiltration resistance and corrosion resistance are reduced. That's why.
【００１３】また、煉瓦製造前の杯土中のジルコニアは
粒径を１００μｍ以下とする。１００μｍ超の粒径で
も、スラグ中のＣａＯは吸収され、ＣａＯ・ＺｒＯ2 化
合物は生成するが、１００μｍ超では煉瓦微粉部へのジ
ルコニアの充填性が損なわれ、耐スラグ浸潤性が低下す
るためである。The zirconia in the clay before the brick production has a particle size of 100 μm or less. Even with a particle size of more than 100 μm, CaO in the slag is absorbed and a CaO · ZrO 2 compound is generated, but if it is more than 100 μm, the filling property of zirconia into the brick fine powder part is impaired, and the slag infiltration resistance is reduced. is there.
【００１４】焼成後の煉瓦化学組成として、ＺｒＯ2 は
１ｗｔ％以上、２０ｗｔ％以下とする。１ｗｔ％未満で
は、十分なＣａＯ吸収能が得られないためである。一
方、２０ｗｔ％超では、焼成後の煉瓦マトリックス部で
のマグネシアとの結合が脆弱化するためであり、さら
に、組織のルーズ化に伴い耐熱スポール性は向上するも
のの、煉瓦自体の圧縮強度・曲げ強度、強いては耐食性
が低下するためである。As a brick chemical composition after firing, ZrO 2 is set to 1 wt% or more and 20 wt% or less. If the content is less than 1 wt%, a sufficient CaO absorption capacity cannot be obtained. On the other hand, if it exceeds 20 wt%, the bond with magnesia in the brick matrix portion after firing becomes weak, and the heat-resistant spall property is improved with the loosening of the structure, but the compressive strength and bending of the brick itself are reduced. This is because strength and, at the very least, corrosion resistance are reduced.
【００１５】本発明の煉瓦製造時に、ＭｇＯ源として焼
結マグネシア、電融マグネシア、電融マグクロ、焼結マ
グクロを用いる。Ｃｒ2 Ｏ3 源としてクロム鉄鉱、酸化
クロム等を用いる。さらにＺｒＯ2 の原料として、未安
定化ジルコニア、ＭｇＯ安定化ジルコニア、ＭｇＯ部分
安定化ジルコニア等を用いるべきである。好ましくはＭ
ｇＯ部分安定化、あるいは未安定化ジルコニアを用いる
べきである。When producing the brick of the present invention, sintered magnesia, electrofused magnesia, electrofused magcro, and sintered magcro are used as the MgO source. Chromite ore, chromium oxide or the like is used as a Cr 2 O 3 source. Further, unstabilized zirconia, MgO-stabilized zirconia, MgO partially stabilized zirconia, or the like should be used as a raw material of ZrO 2 . Preferably M
gO partially stabilized or unstabilized zirconia should be used.
【００１６】これらの方策により、焼成後の煉瓦マトリ
ックス部の耐食性を下げずに、スラグ浸潤抑制能を大き
く向上できる。さらに、ＺｒＯ2 は煉瓦焼成時に周囲の
ＭｇＯにより安定化され、その周辺では空隙が生成し、
この空隙が亀裂進展や発生抑制のサイトとなり、耐熱ス
ポール性も向上できる。[0016] By these measures, the ability to suppress slag infiltration can be greatly improved without lowering the corrosion resistance of the brick matrix portion after firing. Further, ZrO 2 is stabilized by surrounding MgO during brick firing, and voids are generated around the ZrO 2 ,
These voids serve as sites for suppressing crack growth and generation, and can also improve heat resistance spall.
【００１７】本発明の煉瓦を製造するに際して、本発明
の条件に従い原料を配合し、杯土を混練・準備し、加圧
・成形し、焼成することによって、本発明の塩基性煉瓦
を得ることができる。好ましくは１８００℃以上の高温
で焼成すべきである。In producing the brick of the present invention, the basic brick of the present invention is obtained by blending the raw materials according to the conditions of the present invention, kneading and preparing the clay, pressing, molding and firing. Can be. It should preferably be fired at a high temperature of 1800 ° C. or higher.
【００１８】[0018]
【実施例】以下、実施例により本発明をさらに詳細に説
明する。表１に、本発明の実施例（１）〜（１１）およ
び比較例（１２）〜（１６）の耐スポール性、耐食性、
耐スラグ浸潤性を示す。また、これらの製品はそれぞ
れ、１８５０℃で６時間焼成を実施した。本発明例
（１）〜（１１）は、表２に示す基準組成の煉瓦に、本
発明に従って、ジルコニアを添加して製造した。The present invention will be described in more detail with reference to the following examples. Table 1 shows the spall resistance and corrosion resistance of Examples (1) to (11) and Comparative Examples (12) to (16) of the present invention.
Shows resistance to slag infiltration. Each of these products was fired at 1850 ° C. for 6 hours. Inventive Examples (1) to (11) were produced by adding zirconia to bricks having the reference compositions shown in Table 2 according to the present invention.
【００１９】表１における耐熱スポール性指数とは、１
６００℃の溶銑を用いた溶銑浸漬スポール試験におい
て、各製品が破壊に至るまでの耐用回数を示したもの
で、それぞれの数値が大きいほど、耐熱スポール性に優
れることを示す。なお、このスポール試験は２５ｍｍ×
２５ｍｍ×２３０ｍｍの試料を長さ方向に１１５ｍｍ浸
漬して、３分間保持し、その後、７分間の空冷を実施す
るサイクルを、耐火物が破壊するまで行った。耐熱スポ
ール性評価とは、比較品（１２）の耐熱スポール性回数
１０回を基準に、１０回以上を○、１０回未満を×とし
た。The heat-resistant spalling index in Table 1 is 1
In the hot metal immersion spall test using hot metal at 600 ° C., it indicates the number of service life of each product until it breaks. The larger the value of each product, the better the heat-resistant spall property. In addition, this sport test was 25 mm ×
A cycle of immersing a sample of 25 mm × 230 mm in a length direction of 115 mm, holding the sample for 3 minutes, and then performing air cooling for 7 minutes was performed until the refractory was broken. The evaluation of the heat-resistant spalling property was based on the number of times the heat-resistant spalling property of the comparative product (12) was set to 10 times.
【００２０】表１における耐食性指数および耐スラグ浸
潤性指数は、組成がＳｉＯ2 ＝１０ｗｔ％、ＣａＯ＝５
５ｗｔ％、Ａｌ2 Ｏ3 ＝１５ｗｔ％、ＦｅＯ＝１０ｗｔ
％ＭｇＯ＝１０ｗｔ％のスラグを侵食材とする回転侵食
試験を１６００℃で４時間実施した場合の各煉瓦の侵食
量、スラグ浸潤量を、比較品（１２）の侵食量、スラグ
浸潤量を１００とする指数で示したもので、それぞれの
数値が小さいほど、耐食性、耐スラグ浸潤性に優れる事
を示している。耐食性、耐スラグ浸潤性評価とは、耐食
性、耐スラグ浸潤性指数が１００以下の優れるものを
○、１００超を×とした。The corrosion resistance index and slag infiltration resistance index in Table 1 are as follows: composition: SiO 2 = 10 wt%, CaO = 5
5 wt%, Al 2 O 3 = 15 wt%, FeO = 10 wt
% MgO = 10 wt% slag as an erosion material, and the erosion amount and slag infiltration amount of each brick when the rotation erosion test was performed at 1600 ° C. for 4 hours were compared with the erosion amount and slag infiltration amount of the comparative product (12). The smaller the value, the better the corrosion resistance and slag infiltration resistance. The evaluations of corrosion resistance and slag infiltration resistance were evaluated as excellent when the corrosion resistance and slag infiltration resistance index were 100 or less, and as x when more than 100.
【００２１】さらに、総合評価とは、耐熱スポール性評
価、耐食性評価、耐スラグ浸潤性評価のいずれもが○の
場合には○、一つでも×がある場合は×とした。Further, the comprehensive evaluation was evaluated as ○ when all of the evaluations of the heat-resistant spall resistance, the corrosion resistance and the slag infiltration resistance were ○, and x when there was at least one ×.
【００２２】表１において、本発明の実施例（１）〜
（１１）は、比較例（１２）〜（１６）と比べて良好な
耐熱スポール性、耐食性、耐スラグ浸潤性を示した。ま
た、本発明の実施例（１）〜（１１）は、耐熱スポール
性、および、耐スラグ浸潤性が良好であることから、良
好な耐構造スポール性を有する。In Table 1, examples (1) to (1) of the present invention are shown.
(11) showed better heat spall resistance, corrosion resistance, and slag infiltration resistance as compared with Comparative Examples (12) to (16). Further, Examples (1) to (11) of the present invention have good structural spall resistance since they have good heat spall resistance and slag infiltration resistance.
【００２３】[0023]
【表１Ａ】 [Table 1A]
【００２４】[0024]
【表１Ｂ】 [Table 1B]
【００２５】[0025]
【表２】 [Table 2]
【００２６】[0026]
【発明の効果】以上詳述したように、本発明により、溶
融金属容器、特に二次精錬設備であるＲＨ、ＤＨ、ＣＡ
Ｓ等の槽内ライニングにおいて、スラグ浸潤やそれに伴
う構造スポールによる剥離等の損耗を抑制して、設備の
耐用性向上を図ることができるため、本発明は工業的に
価値の高い発明であると言える。As described above in detail, according to the present invention, a molten metal container, in particular, RH, DH, CA
In the lining of the tank such as S, the slag infiltration and the accompanying wear such as peeling due to the structural spall can be suppressed, and the durability of the equipment can be improved, so that the present invention is an industrially valuable invention. I can say.
【図１】本発明によるＭｇＯ−ＺｒＯ2 −Ｃｒ2 Ｏ3 系
煉瓦のミクロ組織を模式的に示す図である。FIG. 1 is a view schematically showing a microstructure of an MgO—ZrO 2 —Cr 2 O 3 brick according to the present invention.
【図２】従来技術によるＭｇＯ−ＺｒＯ2 −Ｃｒ2 Ｏ3
系煉瓦のミクロ組織を模式的に示す図である。FIG. 2 shows MgO—ZrO 2 —Cr 2 O 3 according to the prior art
It is a figure which shows the microstructure of a system brick typically.
Claims (2)
０％、Ｃｒ2 Ｏ3 ≧１０％、ＺｒＯ2 ＝１〜２０％であ
り、ミクロ組織のマトリックス部がＭｇＯとＺｒＯ2 か
らなり、残部が１００μｍ超のＣｒ2 Ｏ3 粒子の他、Ｍ
ｇＯ粒子からなるミクロ組織を有することを特徴とする
塩基性煉瓦。1. The composition of a chemical composition, wherein the weight ratio is MgO ≧ 2.
0%, Cr 2 O 3 ≧ 10%, a ZrO 2 = 1~20%, becomes the matrix of the microstructure of MgO and ZrO 2, another remainder of 100μm greater than Cr 2 O 3 particles, M
A basic brick having a microstructure of gO particles.
グネシア、電融マグクロ、焼結マグクロの１種以上を、
Ｃｒ2 Ｏ3 源として１００μｍ超のクロム鉄鉱、酸化ク
ロムの１種または２種を、さらに、１００μｍ以下のジ
ルコニアを煉瓦製造の出発原料とすることを特徴とす
る、化学成分組成が、重量比で、ＭｇＯ≧２０％、Ｃｒ
2 Ｏ3 ≧１０％、ＺｒＯ2 ＝１〜２０％であり、ミクロ
組織のマトリックス部がＭｇＯとＺｒＯ2 からなり、残
部が１００μｍ超のＣｒ2 Ｏ3 粒子の他、ＭｇＯ粒子か
らなるミクロ組織を有する塩基性煉瓦の製造方法。2. An MgO source comprising one or more of sintered magnesia, electrofused magnesia, electrofused magcro, and sintered magcro,
It is characterized in that, as a Cr 2 O 3 source, one or two types of chromite ore and chromium oxide having a size of more than 100 μm and zirconia having a size of 100 μm or less are used as starting materials for brick production. , MgO ≧ 20%, Cr
2 O 3 ≧ 10%, ZrO 2 = 1 to 20%, and the matrix portion of the microstructure is composed of MgO and ZrO 2 , and the rest is a microstructure composed of MgO particles in addition to Cr 2 O 3 particles of more than 100 μm. A method for producing a basic brick having the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9110120A JPH10287465A (en) | 1997-04-14 | 1997-04-14 | Basic brick and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9110120A JPH10287465A (en) | 1997-04-14 | 1997-04-14 | Basic brick and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10287465A true JPH10287465A (en) | 1998-10-27 |
Family
ID=14527549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9110120A Withdrawn JPH10287465A (en) | 1997-04-14 | 1997-04-14 | Basic brick and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10287465A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100372808C (en) * | 2006-04-18 | 2008-03-05 | 中国建筑材料科学研究院大石桥镁砖厂 | Making process of zirconium-containing magnesia brick |
-
1997
- 1997-04-14 JP JP9110120A patent/JPH10287465A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100372808C (en) * | 2006-04-18 | 2008-03-05 | 中国建筑材料科学研究院大石桥镁砖厂 | Making process of zirconium-containing magnesia brick |
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